Locking device for elevators and elevator-doors



W. W. WOOD.

Patented Jan.

(No Model.)

LOOKING DEVICE POB. BLE VATORS AND ELEVATOR DOORS.

. UNITED STATES PATENT OFFICE.

W'ALTER WOLFE VOOD, OF HONESDALE, PENNSYLVANIA.

LOCKING DEVICE FOR ELEVATORS AND ELEVATOR-DOORS.

SPECIFICATION forming part of Letters Patent No. 553,379, dated January21, 1896.

Application filed August 26, 1895. Serial No. 560,578. (No model.)

To @ZZ whom, it may con/cern:

Be it known that LWALTER WoLFE WOOD, a citizen of the United States,residing at I'Ionesdale, in the county of Vay'ne and State ofPennsylvania, have invented certain new and useful Improvements inLocking Devices for Elevators and Elevator-Doors, of which the followingis a specification, reference being had therein to the accompanyingdrawings.

My invention relates to elevator-cages and elevator-shaftings, and it isthe object thereof to provide efficient means for locking anelevator-door in closed position during the ascent and descent of theelevator-cage with means for automatically releasing the locking meansas the elevator-cage reaches the door, and also means for preventing theaccidental or intentional starting of the elevator-cage when the door isopen.

To this end the invention includes an arm carried by the door with meansfor engaging the same when the door is closed to lock said door in thatposition, a clamping device through which the controller-rope passes,

- and means carried by the cage for disengaging said arm to permit ofthe opening of the door and at the same time to move said arm in such aposition that upon the opening of the door it will cause thecontroller-rope clamp to operate and thereby prevent the movement ofsaid rope until the door is closed. The invention also includes thedetails of construction as will be hereinafter described, andparticularly pointed out in the claims.

The invention is illustra-ted in the accompanying drawings, in whichMFigure l is a sideelevation of a cage, showing the front wall of anelevator-shaft in section. Fig. 2 is a side A,elevation of the frontwall of the elevatorfshaft, and Fig. 3 is a plan view of the same. Fig.4 is aview of a detail. A portion of the front wall of an elevatorshaftis shown at l, in which slides the door 2 upon suitable tracks, and tothe inside of this door, near the center thereof, is secured thespring-arm v3, one end of which projects past the edge of the door andis tapered, as at 4, to insure it readily entering the slot 5 in acasing6 secured to the wall l. This casing incloses a clamp 6', through whichthe controller-rope 7 passes.

Then the elevator-shaft door 2 is closed, the end 4 of the arm 3 restsagainst the side of the casing G, and the door is thus locked in closedposition. Thus means are provided for engaging said arm to prevent themovement of said door, and the door can only be released by disengagingthe arm 3 from said casing, this being accomplished automatically by theelevator-cage as it reaches said door in its upward or downwardmovement, as will be hereinafter described.

The elevator-cage S is provided on its front face with the projectingguide 9, which is the means for disengaging the end of the arm 3 fromthe casing, the upper and lower ends thereof being beveled, and thisguide is adapted to come into contact with and press the end of the arm3 inwardly to register with the slot in the casing G as the elevatorreaches the door. Means are provided for entering the casing andoperating the casing, and in the present instance these means consist ofthe arm 3, the end of which being now disengaged' from the casing 6 thedoor can be slid back by the elevator-operator,

the wedge-shaped or tapered end i entering the slot 5 and pressing `thesides of the clamp held in the casing (i together, this clampconstituting the means for clamping the con troller-rope, thecontroller-rope Tbeing interposed between the same, thus constitutingmeans adapted to be operated by said arm to clamp said controller-rope.The rope will be thus eifectually held and the starting of theelevatorcage prevented until the door is again closed, when the end ofthe arm i will be withdrawn from within the casing G and permit theclamp therein to release the rope 7, the end of the arm springingoutwardly and again engaging the side of the casing G.

IIavin g now described my invention, what I claim is- 1. In combination,the elevator cage, the door,4 the controller rope, the arm carried bysaid door, the means for engaging said arm to prevent the movement ofsaid door and Vthe means adapted to be operated by said arm to clampsaid controller-rope, substantially as described.

2. In combination, the elevator cage and door, the casing, the clamptherein, the controller rope passing through said clamp, and

IOO

means Carried by said. door, adapted to enter4 said easing and operatesaid clamp to hold said rope against movement, substantially asdescribed.

3. In combination, the elevator cage, the

- door, the controller rope, the easing the means the Clamp held. insaid Casing, the vcontroller rope adapted to be held thereby, the meanscarried by the elevator cage for disengaging the end of said arm fromthe easing to permit the opening of the door whereby said arm will enterthe slot in said easing and operate said clamp to hold said controllerrope and prevent the starting of the elevator cage,

substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER VOLFE VOOI). Witnesses:

J. A. KIRKPATRICK, W. L. OCONNELL.

